A (reasonably) rare and old example of stibnite from Peru. Unlike the more contemporary stibnites from Quiruvilca, this specimen displays well defined, isolated crystals (the Quiruvilca pieces tend to be tightly packed masses.)
The specimen is very well balanced, and I particularly like seeing the stibnite on a solid (non-stibnite) matrix. Even among the endless specimens from China, seeing an isolated stibnite crystal on a "matrix" that is not just more stibnite is highly unusual-- and if you do see a matrix, then a stibnite will likely be a cluster of small crystals.
This is very old material-- even in Peru, specimens from Raura are not often seen.